When I close and re-open Firefox for Android (latest version), it often 'forgets' what my last tab was. It will show 'about:blank' instead. Sometimes it will load the tab after showing about blank, sometimes it won't. This issue is frequent but I cannot replicate it on demand. Is anyone else having this problem? I had it with Firefox Preview and hoped it would be fixed by now...but here we are with the new official build of Firefox proper and it's still a problem.